# ${{\boldsymbol \Xi}_{{c}}^{+}}$ MEAN LIFE INSPIRE search

VALUE ($10^{-15}$ s) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 456 \pm5}$ OUR AVERAGE
$457$ $\pm5$ $\pm3$ 56k 1
 2019 AG
LHCB ${{\mathit \Xi}_{{c}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
$503$ $\pm47$ $\pm18$ 250
 2002
CLE2 ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}{{\mathit \Upsilon}{(4S)}}$
$439$ $\pm22$ $\pm9$ 532
 2001 D
FOCS ${{\mathit \gamma}}$ nucleus, ${{\overline{\mathit E}}}_{\gamma }$ $\approx{}$ 180 GeV
$340$ ${}^{+70}_{-50}$ $\pm20$ 56
 1998
E687 ${{\mathit \gamma}}{}^{}\mathrm {Be}$, ${{\overline{\mathit E}}}_{\gamma }$= $220$ GeV
$400$ ${}^{+180}_{-120}$ $\pm100$ 102
 1987
SPEC ${{\mathit n}}{}^{}\mathrm {A}$ $\simeq{}$ 600 GeV
$480$ ${}^{+210}_{-150}$ ${}^{+200}_{-100}$ 53
 1985 C
SPEC ${{\mathit \Sigma}^{-}}{}^{}\mathrm {Be}$ 135 GeV
• • • We do not use the following data for averages, fits, limits, etc. • • •
$410$ ${}^{+110}_{-80}$ $\pm20$ 30
 1993 B
E687
$200$ ${}^{+110}_{-60}$ 6
 1989 C
ACCM ${{\mathit \pi}^{-}}$ (${{\mathit K}^{-}}$) ${}^{}\mathrm {Cu}$ 230 GeV
1  AAIJ 2019AG reports [${{\mathit \Xi}_{{c}}^{+}}$ MEAN LIFE] $/$ [${{\mathit D}^{\pm}}$ MEAN LIFE] = $0.4392$ $\pm0.0034$ $\pm0.0028$ which we multiply by our best value ${{\mathit D}^{\pm}}$ MEAN LIFE = ($1.040$ $\pm0.007$) $\times 10^{-12}$ s. Our first error is their experiment's error and our second error is the systematic error from using our best value.
References:
 AAIJ 2019AG
PR D100 032001 Precision measurement of the $\Lambda_c^+$, $\Xi_c^+$ and $\Xi_c^0$ baryon lifetimes
 MAHMOOD 2002
PR D65 031102 Measurement of the ${{\mathit \Xi}_{{c}}^{+}}$ Lifetime
PL B523 53 A New Measurement of the ${{\mathit \Xi}_{{c}}^{+}}$ Lifetime
PL B427 211 A New Measurement of the Lifetime of the ${{\mathit \Xi}_{{c}}^{+}}$
PRL 70 1381 Measurement of the Mass and Lifetime of the ${{\mathit \Xi}_{{c}}^{+}}$
PL B233 522 Measurement of the Mass and Lifetime of the Charmed Strange Baryon ${{\mathit \Xi}_{{c}}^{+}}$
PRL 59 1530 Production of the Charmed Strange Baryon ${{\mathit \Xi}_{{c}}^{+}}$ by Neutrons
PL 150B 230 Measurements of the Lifetime of the Charmed Strange Baryon ${{\mathit A}^{+}}$